java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:41:33,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:41:33,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:41:33,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:41:33,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:41:33,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:41:33,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:41:33,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:41:33,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:41:33,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:41:33,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:41:33,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:41:33,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:41:33,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:41:33,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:41:33,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:41:33,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:41:33,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:41:33,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:41:33,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:41:33,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:41:33,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:41:33,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:41:33,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:41:33,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:41:33,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:41:33,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:41:33,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:41:33,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:41:33,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:41:33,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:41:33,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:41:33,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:41:33,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:41:33,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:41:33,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:41:33,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:41:33,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:41:33,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:41:33,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:41:33,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:41:33,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:41:33,850 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:41:33,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:41:33,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:41:33,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:41:33,852 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:41:33,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:41:33,853 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:41:33,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:41:33,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:41:33,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:41:33,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:41:33,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:41:33,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:41:33,854 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:41:33,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:41:33,855 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:41:33,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:41:33,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:41:33,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:41:33,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:41:33,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:41:33,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:33,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:41:33,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:41:33,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:41:33,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:41:33,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:41:33,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:41:33,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:41:34,134 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:41:34,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:41:34,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:41:34,158 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:41:34,158 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:41:34,159 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-13 21:41:34,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaff7d9d5/9ce344d28a8141b29036a7458dfe2ddb/FLAG1500a256e [2019-10-13 21:41:34,839 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:41:34,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-13 21:41:34,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaff7d9d5/9ce344d28a8141b29036a7458dfe2ddb/FLAG1500a256e [2019-10-13 21:41:35,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaff7d9d5/9ce344d28a8141b29036a7458dfe2ddb [2019-10-13 21:41:35,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:41:35,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:41:35,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:35,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:41:35,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:41:35,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35, skipping insertion in model container [2019-10-13 21:41:35,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,142 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:41:35,193 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:41:35,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:35,739 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:41:35,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:35,879 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:41:35,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35 WrapperNode [2019-10-13 21:41:35,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:35,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:41:35,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:41:35,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:41:35,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:35,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... [2019-10-13 21:41:36,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:41:36,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:41:36,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:41:36,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:41:36,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:41:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:41:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:41:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:41:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:41:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:41:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:41:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:41:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:41:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:41:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:41:38,198 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:41:38,198 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:41:38,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:38 BoogieIcfgContainer [2019-10-13 21:41:38,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:41:38,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:41:38,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:41:38,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:41:38,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:41:35" (1/3) ... [2019-10-13 21:41:38,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3eec0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:38, skipping insertion in model container [2019-10-13 21:41:38,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:35" (2/3) ... [2019-10-13 21:41:38,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3eec0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:38, skipping insertion in model container [2019-10-13 21:41:38,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:38" (3/3) ... [2019-10-13 21:41:38,209 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label55.c [2019-10-13 21:41:38,220 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:41:38,228 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:41:38,240 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:41:38,266 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:41:38,266 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:41:38,266 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:41:38,266 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:41:38,267 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:41:38,267 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:41:38,267 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:41:38,267 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:41:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-13 21:41:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 21:41:38,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:38,299 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:38,301 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -219364297, now seen corresponding path program 1 times [2019-10-13 21:41:38,315 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:38,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101422354] [2019-10-13 21:41:38,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:38,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:38,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:38,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101422354] [2019-10-13 21:41:38,725 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:38,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:38,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28606985] [2019-10-13 21:41:38,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:38,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:38,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:38,750 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-13 21:41:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:39,359 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-13 21:41:39,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:39,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-13 21:41:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:39,384 INFO L225 Difference]: With dead ends: 273 [2019-10-13 21:41:39,384 INFO L226 Difference]: Without dead ends: 175 [2019-10-13 21:41:39,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-13 21:41:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-13 21:41:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-13 21:41:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-13 21:41:39,489 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-13 21:41:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:39,490 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-13 21:41:39,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-13 21:41:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:41:39,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:39,496 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:39,497 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash -701899076, now seen corresponding path program 1 times [2019-10-13 21:41:39,497 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:39,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469767352] [2019-10-13 21:41:39,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:39,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:39,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:39,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469767352] [2019-10-13 21:41:39,690 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:39,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:41:39,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374564496] [2019-10-13 21:41:39,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:41:39,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:41:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:41:39,694 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-10-13 21:41:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:40,476 INFO L93 Difference]: Finished difference Result 681 states and 1263 transitions. [2019-10-13 21:41:40,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:41:40,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-13 21:41:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:40,484 INFO L225 Difference]: With dead ends: 681 [2019-10-13 21:41:40,484 INFO L226 Difference]: Without dead ends: 511 [2019-10-13 21:41:40,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:41:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-13 21:41:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 427. [2019-10-13 21:41:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-13 21:41:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 727 transitions. [2019-10-13 21:41:40,543 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 727 transitions. Word has length 94 [2019-10-13 21:41:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:40,544 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 727 transitions. [2019-10-13 21:41:40,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:41:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 727 transitions. [2019-10-13 21:41:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 21:41:40,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:40,551 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:40,552 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash -650188957, now seen corresponding path program 1 times [2019-10-13 21:41:40,553 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:40,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53906746] [2019-10-13 21:41:40,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:40,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:40,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:40,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53906746] [2019-10-13 21:41:40,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:40,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:40,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188151463] [2019-10-13 21:41:40,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:40,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:40,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:40,738 INFO L87 Difference]: Start difference. First operand 427 states and 727 transitions. Second operand 3 states. [2019-10-13 21:41:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:41,188 INFO L93 Difference]: Finished difference Result 1269 states and 2235 transitions. [2019-10-13 21:41:41,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:41,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-13 21:41:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:41,195 INFO L225 Difference]: With dead ends: 1269 [2019-10-13 21:41:41,195 INFO L226 Difference]: Without dead ends: 847 [2019-10-13 21:41:41,199 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-10-13 21:41:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2019-10-13 21:41:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-13 21:41:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1392 transitions. [2019-10-13 21:41:41,254 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1392 transitions. Word has length 110 [2019-10-13 21:41:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:41,255 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1392 transitions. [2019-10-13 21:41:41,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1392 transitions. [2019-10-13 21:41:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:41:41,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:41,265 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:41,266 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash 482298052, now seen corresponding path program 1 times [2019-10-13 21:41:41,266 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:41,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971658598] [2019-10-13 21:41:41,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:41,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:41,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:41:41,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971658598] [2019-10-13 21:41:41,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974482172] [2019-10-13 21:41:41,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:41,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:41:41,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:41:41,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:41:41,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:41:41,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:41:41,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001804931] [2019-10-13 21:41:41,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:41:41,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:41,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:41:41,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:41:41,803 INFO L87 Difference]: Start difference. First operand 847 states and 1392 transitions. Second operand 5 states. [2019-10-13 21:41:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:42,183 INFO L93 Difference]: Finished difference Result 1689 states and 2830 transitions. [2019-10-13 21:41:42,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:41:42,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-13 21:41:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:42,190 INFO L225 Difference]: With dead ends: 1689 [2019-10-13 21:41:42,191 INFO L226 Difference]: Without dead ends: 847 [2019-10-13 21:41:42,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:41:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-10-13 21:41:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2019-10-13 21:41:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-13 21:41:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1251 transitions. [2019-10-13 21:41:42,257 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1251 transitions. Word has length 132 [2019-10-13 21:41:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:42,258 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1251 transitions. [2019-10-13 21:41:42,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:41:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1251 transitions. [2019-10-13 21:41:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:41:42,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:42,264 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:42,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:42,470 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:42,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1609783538, now seen corresponding path program 1 times [2019-10-13 21:41:42,471 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:42,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600801638] [2019-10-13 21:41:42,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:42,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:42,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:42,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600801638] [2019-10-13 21:41:42,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43010942] [2019-10-13 21:41:42,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:42,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:42,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:42,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:42,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447466974] [2019-10-13 21:41:42,916 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-13 21:41:42,916 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:41:42,923 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:41:42,932 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:41:42,933 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:41:43,279 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-13 21:41:43,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:43,960 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:41:43,967 INFO L168 Benchmark]: Toolchain (without parser) took 8843.11 ms. Allocated memory was 138.4 MB in the beginning and 342.4 MB in the end (delta: 203.9 MB). Free memory was 100.5 MB in the beginning and 299.2 MB in the end (delta: -198.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:43,968 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:41:43,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 755.20 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 100.3 MB in the beginning and 171.1 MB in the end (delta: -70.8 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:43,970 INFO L168 Benchmark]: Boogie Preprocessor took 122.58 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 166.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:43,971 INFO L168 Benchmark]: RCFGBuilder took 2196.99 ms. Allocated memory was 204.5 MB in the beginning and 251.1 MB in the end (delta: 46.7 MB). Free memory was 166.3 MB in the beginning and 206.7 MB in the end (delta: -40.5 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:43,972 INFO L168 Benchmark]: TraceAbstraction took 5762.75 ms. Allocated memory was 251.1 MB in the beginning and 342.4 MB in the end (delta: 91.2 MB). Free memory was 204.9 MB in the beginning and 299.2 MB in the end (delta: -94.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-13 21:41:43,976 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 755.20 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 100.3 MB in the beginning and 171.1 MB in the end (delta: -70.8 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.58 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 166.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2196.99 ms. Allocated memory was 204.5 MB in the beginning and 251.1 MB in the end (delta: 46.7 MB). Free memory was 166.3 MB in the beginning and 206.7 MB in the end (delta: -40.5 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5762.75 ms. Allocated memory was 251.1 MB in the beginning and 342.4 MB in the end (delta: 91.2 MB). Free memory was 204.9 MB in the beginning and 299.2 MB in the end (delta: -94.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...